The three tracks "Blow Yr Mind", "Black Hole", and "Becky" were on the original promos released by the label and are widely available in the UK and Europe. Lyrics in question include "We'll wait with knives after class!" and "Eating pizza is really great / So is destroying everything you hate." There are also some songs about zombies which may be offensive to zombies.
In any case, you can check out the artwork here.